"It didn't cost a lot to make, it didn't take a lot of time to make, and there are only a few actors in it, but the story is so compelling," he said. "I have such faith in our director James Watkins who, as well as being a very talented man, is also very brave.

"I have a friend who has seen a test screening recently and there is apparently a portion for like 15 minutes in the film with no dialog. It's just me walking around the house, but it is apparently some of the most compelling footage. It's going to be terrifying."

He continued: "At the test screening people were apparently leaping out of their seats, terrified. So I think it's going to be a really good movie. I'm very excited. I'm very rarely excited to see stuff that I'm in - and I'm actually very excited about seeing this.

"[I scare] very easily. It's the kind of film I probably wouldn't see unless I was in it. I know a lot of people who have said they won't be able to see it and I'm going to have to force them to."